Filtration unit for exhaust air from a clean room helmet worn for a sterile environment or the like



FIG. 1 is a top plan view of a filtration unit for exhaust air from aclean room helmet worn in a sterile environment or the like showing ournew design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a left side elevational view thereof, the right side beingsubstantially similar in appearance;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and

FIG. 6 is a perspective view thereof.

The ornamental design for a filtration unit for exhaust air from a cleanroom helmet worn in a sterile environment or the like, as shown anddescribed.